Upon speaking the Deplorable word with the proper ceremonies, the entire world is swathed in a purely destructive impulse destroying all creatures. This impulse does 20,000d6 damage (70,000 average), or half with a successful fortitude save to all creatures exept you. Any targets reduced to -10 hit points or less (including any constructs or undead reduced to 0 hit points), are utterly destroyed as if disintegrated, leaving behind only a trace of fine dust.

Casting this spell drains 20,000 XP and causes 10 points of ability damage to every ability

Speaking the Deplorable Word also causes you to lose all spellcasting ability for 25 years and a day. Furthermore the knowledge of the proper ceremonies and what the Deplorable Word is are gone from your mind and you must develop this spell from scratch in order to cast it again.